Bug 1117763 - Remove range request headers on cache entry open failure. r=michal

netwerk/protocol/http/nsHttpChannel.cpp

@@ -2216,8 +2216,7 @@ nsHttpChannel::MaybeSetupByteRangeRequest(int64_t partialLen, int64_t contentLen
     nsresult rv = SetupByteRangeRequest(partialLen);
     if (NS_FAILED(rv)) {
         // Make the request unconditional again.
-        mRequestHead.ClearHeader(nsHttp::Range);
-        mRequestHead.ClearHeader(nsHttp::If_Range);
+        UntieByteRangeRequest();
     }
 
     return rv;
@@ -2251,6 +2250,13 @@ nsHttpChannel::SetupByteRangeRequest(int64_t partialLen)
     return NS_OK;
 }
 
+void
+nsHttpChannel::UntieByteRangeRequest()
+{
+    mRequestHead.ClearHeader(nsHttp::Range);
+    mRequestHead.ClearHeader(nsHttp::If_Range);
+}
+
 nsresult
 nsHttpChannel::ProcessPartialContent()
 {
@@ -2965,9 +2971,16 @@ nsHttpChannel::OnCacheEntryCheck(nsICacheEntry* entry, nsIApplicationCache* appC
             mCachedContentIsPartial = NS_SUCCEEDED(rv) && mIsPartialRequest;
             if (mCachedContentIsPartial) {
                 rv = OpenCacheInputStream(entry, false, !!appCache);
-                *aResult = ENTRY_NEEDS_REVALIDATION;
+                if (NS_FAILED(rv)) {
+                    UntieByteRangeRequest();
                     return rv;
-            } else if (size == 0 && mCacheOnlyMetadata) {
+                }
+
+                *aResult = ENTRY_NEEDS_REVALIDATION;
+                return NS_OK;
+            }
+
+            if (size == 0 && mCacheOnlyMetadata) {
                 // Don't break cache entry load when the entry's data size
                 // is 0 and mCacheOnlyMetadata flag is set. In that case we
                 // want to proceed since the LOAD_ONLY_IF_MODIFIED flag is

netwerk/protocol/http/nsHttpChannel.h

@@ -367,6 +367,7 @@ private:
     nsresult MaybeSetupByteRangeRequest(int64_t partialLen, int64_t contentLength,
                                         bool ignoreMissingPartialLen = false);
     nsresult SetupByteRangeRequest(int64_t partialLen);
+    void UntieByteRangeRequest();
     nsresult OpenCacheInputStream(nsICacheEntry* cacheEntry, bool startBuffering,
                                   bool checkingAppCacheEntry);